Rename sky/engine/bindings2 to sky/engine/bindings

sky/engine/bindings2/dart_callback.cc

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "sky/engine/config.h"
-#include "sky/engine/bindings2/dart_callback.h"
-
-#include "sky/engine/tonic/dart_converter.h"
-#include "sky/engine/tonic/dart_error.h"
-#include "sky/engine/tonic/dart_state.h"
-
-namespace blink {
-
-DartCallback::DartCallback(DartState* dart_state,
-                           Dart_Handle callback,
-                           Dart_Handle& exception)
-    : callback_(dart_state, callback) {
-  if (!Dart_IsClosure(callback)) {
-    exception = ToDart("Callback must be a function");
-    callback_.Clear();
-  }
-}
-
-DartCallback::~DartCallback() {
-}
-
-bool DartCallback::IsIsolateAlive() const {
-  return !!callback_.dart_state();
-}
-
-Dart_Isolate DartCallback::GetIsolate() const {
-  return callback_.dart_state()->isolate();
-}
-
-bool DartCallback::handleEvent(int argc, Dart_Handle* argv) {
-  LogIfError(Dart_InvokeClosure(callback_.value(), argc, argv));
-  return true;
-}
-
-}  // namespace blink